CVE-2026-12938
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
The Newsletters Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'target' attribute of the [newsletters_post] shortcode in versions up to and including 4.15 due to insufficient input sanitization and output escaping in the posts_single() function and shortcode_posts() handler.
Risk Assessment
Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts that execute whenever a user visits an injected page.
Recommendation
Update the plugin to the latest version immediately and use esc_attr() for all HTML attributes generated by shortcodes.
Other vulnerabilities in Newsletters Lite
Original NVD description (English source)
The Newsletters Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'target' attribute of the [newsletters_post] shortcode in versions up to and including 4.15. This is due to insufficient input sanitization and output escaping in the posts_single() function which propagates the attacker-controlled 'target' attribute into the global $wpml_target, and in the shortcode_posts() 'post_thumbnail' handler which concatenates $wpml_target into a target="..." HTML attribute without esc_attr(). This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS